Masoud Sarabi, who witnessed one of the protests, confirmed the authenticity of a video shot on Tehran's Enghelab Street. The others appeared to be authentic, but The Associated Press could not independently verify them.

The women appear to be following the lead of a 31-year-old protester identified as Vida Movahed, who took off her headscarf on the same street in late December. She was detained for a few weeks and then released.

Women showing their hair in public can be jailed for up to two months or fined $25.

The Islamic dress code, in place since the 1979 revolution, considers Islamic veiling or hijab, obligatory for any female above 13 in Iran and says they should cover themselves from head to toe while disavowing any figure-hugging dress.